How to open layout on button click (android)

-Inflate the button from the xml
-add an onClickListener on it
-set a new layout in the onClick event

Button btn = (Button) findViewById(R.id.myButton);
btn.setOnClickListener(new OnClickListener(){

@Override
public void onClick(View v)
{
    MyActivity.setContentView(R.layout.newlayout);
}

});

Something like this should work...

First Create your two layout:

main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:background="#ffffff"  >

    <TextView
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:textColor="#000000"
    android:text="This is Activity 1" />

       <Button android:text="Next"
        android:id="@+id/Button01"
        android:layout_width="250px"
            android:textSize="18px"
        android:layout_height="55px">
    </Button>    

</LinearLayout>

second.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:background="#ffffff"  >

    <TextView
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:textColor="#000000"
    android:text="This is Activity 2" />

       <Button android:text="Previous"
        android:id="@+id/Button02"
        android:layout_width="250px"
            android:textSize="18px"
        android:layout_height="55px">
    </Button>    

</LinearLayout>

Second Add your Activity to the manifest file

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
      package="com.rr"
      android:versionCode="1"
      android:versionName="1.0">
    <application android:icon="@drawable/icon" android:label="@string/app_name">
        <activity android:name=".Activity1"
                  android:label="@string/app_name">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity android:name=".Activity2"></activity>
    </application>
    <uses-sdk android:minSdkVersion="3" />
</manifest>

Activity1.java

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;

public class Activity1 extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        Button next = (Button) findViewById(R.id.Button01);
        next.setOnClickListener(new View.OnClickListener() {
            public void onClick(View view) {
                Intent myIntent = new Intent(view.getContext(), Activity2.class);
                startActivityForResult(myIntent, 0);
            }

        });
    }
}

To switch to Activity2 you have to:

1. Gets a reference to the button with ID Button01 on the layout using (Button) findViewById(R.id.Button01).

2. Create an OnClick listener for the button.

3. And the most important part, creates an “Intent” to start another Activity. The intent needs two parameters: a context and the name of the Activity that we want to start (Activity2.class)

Activity2.java

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;

public class Activity2 extends Activity {

    /** Called when the activity is first created. */
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.second);

        Button next = (Button) findViewById(R.id.Button02);
        next.setOnClickListener(new View.OnClickListener() {
            public void onClick(View view) {
                Intent intent = new Intent();
                setResult(RESULT_OK, intent);
                finish();
            }

        });
    }